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WebPartManager.BrowseDisplayMode Field

  • Reference

Definition

Namespace:
System.Web.UI.WebControls.WebParts
Assembly:
System.Web.dll

Represents the default display mode for pages that contain Web Parts controls. This field is read-only.

public: static initonly System::Web::UI::WebControls::WebParts::WebPartDisplayMode ^ BrowseDisplayMode;
public static readonly System.Web.UI.WebControls.WebParts.WebPartDisplayMode BrowseDisplayMode;
 staticval mutable BrowseDisplayMode : System.Web.UI.WebControls.WebParts.WebPartDisplayMode
Public Shared ReadOnly BrowseDisplayMode As WebPartDisplayMode

Field Value

WebPartDisplayMode

Examples

The following code example demonstrates how to work with the BrowseDisplayMode field programmatically. The code populates a drop-down list with the supported display modes, which in this case are browse and design. Notice that, in the Page_PreRender method, the code checks whether the current DisplayMode property is set to BrowseDisplayMode. If so, Label1 will be visible, and if not, Label1 will be hidden.

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">


  protected void Page_Init(object sender, EventArgs e)
  {
    foreach (WebPartDisplayMode mode in mgr1.SupportedDisplayModes)
    {
      string modeName = mode.Name;
      if (mode.IsEnabled(mgr1))
      {
        ListItem item = new ListItem(modeName, modeName);
        DisplayModeDropdown.Items.Add(item);
      }      
    }
  }

  protected void DisplayModeDropdown_SelectedIndexChanged(object 
    sender, EventArgs e)
  {
    String selectedMode = DisplayModeDropdown.SelectedValue;
    WebPartDisplayMode mode = 
      mgr1.SupportedDisplayModes[selectedMode];
    if (mode != null)
      mgr1.DisplayMode = mode;
  }

  protected void Page_PreRender(object sender, EventArgs e)
  {
    if (mgr1.DisplayMode == WebPartManager.BrowseDisplayMode)
      Label1.Visible = true;
    else
      Label1.Visible = false;
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="mgr1" runat="server">
      </asp:WebPartManager>
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <asp:Calendar ID="Calendar1" runat="server" 
            Title="My Calendar" />
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:WebPartZone ID="WebPartZone2" runat="server">
        <ZoneTemplate>
          <asp:BulletedList 
            DisplayMode="HyperLink" 
            ID="BulletedList1" 
            runat="server"
            Title="My Links">
            <asp:ListItem Value="http://www.microsoft.com">
            Microsoft
            </asp:ListItem>
            <asp:ListItem Value="http://www.msn.com">
            MSN
            </asp:ListItem>
            <asp:ListItem Value="http://www.contoso.com">
            Contoso Corp.
            </asp:ListItem>
          </asp:BulletedList>
        </ZoneTemplate>
      </asp:WebPartZone>
      <hr />
      <asp:Label ID="Label1" runat="server" 
        Text="Currently in Browse Mode" 
        Font-Bold="true"
        Font-Size="125%" />
      <br />
      <asp:DropDownList ID="DisplayModeDropdown" runat="server" 
        AutoPostBack="true"
        Width="120"
        OnSelectedIndexChanged=
        "DisplayModeDropdown_SelectedIndexChanged">
      </asp:DropDownList>
    </div>
    </form>
</body>
</html>

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Protected Sub Page_Init(ByVal sender As Object, _
    ByVal e As EventArgs)
    Dim mode As WebPartDisplayMode
    For Each mode In mgr1.SupportedDisplayModes
      Dim modeName As String = mode.Name
      If mode.IsEnabled(mgr1) Then
        Dim item As ListItem = New ListItem(modeName, modeName)
        DisplayModeDropdown.Items.Add(item)
      End If
    Next
    
  End Sub

  Protected Sub DisplayModeDropdown_SelectedIndexChanged(ByVal _
    sender As Object, ByVal e As EventArgs)
    Dim selectedMode As String = _
      DisplayModeDropdown.SelectedValue
    Dim mode As WebPartDisplayMode = _
      mgr1.SupportedDisplayModes(selectedMode)
    If mode IsNot Nothing Then
      mgr1.DisplayMode = mode
    End If
  End Sub
  
  Protected Sub Page_PreRender(ByVal sender As Object, _
    ByVal e As System.EventArgs)
    If mgr1.DisplayMode.Equals(WebPartManager.BrowseDisplayMode) Then
      Label1.Visible = True
    Else
      Label1.Visible = False
    End If
  End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="mgr1" runat="server">
      </asp:WebPartManager>
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <asp:Calendar ID="Calendar1" runat="server" 
            Title="My Calendar" />
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:WebPartZone ID="WebPartZone2" runat="server">
        <ZoneTemplate>
          <asp:BulletedList 
            DisplayMode="HyperLink" 
            ID="BulletedList1" 
            runat="server"
            Title="My Links">
            <asp:ListItem Value="http://www.microsoft.com">
            Microsoft
            </asp:ListItem>
            <asp:ListItem Value="http://www.msn.com">
            MSN
            </asp:ListItem>
            <asp:ListItem Value="http://www.contoso.com">
            Contoso Corp.
            </asp:ListItem>
          </asp:BulletedList>
        </ZoneTemplate>
      </asp:WebPartZone>
      <hr />
      <asp:Label ID="Label1" runat="server" 
        Text="Currently in Browse Mode" 
        Font-Bold="true"
        Font-Size="125%" />
      <br />
      <asp:DropDownList ID="DisplayModeDropdown" runat="server" 
        AutoPostBack="true"
        Width="120"
        OnSelectedIndexChanged=
        "DisplayModeDropdown_SelectedIndexChanged">
      </asp:DropDownList>
    </div>
    </form>
</body>
</html>

After you load the page in a browser, you are in browse mode by default. Notice the label on the page that indicates you are in browse mode. Use the drop-down list control to switch the page to design mode. Notice that, because of the code in the Page_PreRender method, the label is now hidden.

Remarks

The BrowseDisplayMode field references a custom WebPartDisplayMode object that is created and contained by the WebPartManager control. Because this is a static object, you can refer to it directly through the WebPartManager class without needing an instance of the control.

When a page that contains Web Parts controls first loads, it is in BrowseDisplayMode (browse mode) by default. When users are simply browsing as they would on a normal Web page, the page remains in browse mode. If users want to personalize a page's layout, controls, appearance, or behavior, they must switch the page into one of the specialized display modes available through the SupportedDisplayModes property.

Applies to

See also